660510481 has 4 divisors (see below), whose sum is σ = 689228352. Its totient is φ = 631792612.

The previous prime is 660510479. The next prime is 660510493. The reversal of 660510481 is 184015066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184015066 = 2 ⋅92007533.

It is not a de Polignac number, because 660510481 - 2¹ = 660510479 is a prime.

It is a super-2 number, since 2×660510481² = 872548191021702722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660516481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14358901 + ... + 14358946.

It is an arithmetic number, because the mean of its divisors is an integer number (172307088).

Almost surely, 2^660510481 is an apocalyptic number.

It is an amenable number.

660510481 is a deficient number, since it is larger than the sum of its proper divisors (28717871).

660510481 is a wasteful number, since it uses less digits than its factorization.

660510481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28717870.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 660510481 is about 25700.3984599461. The cubic root of 660510481 is about 870.8831833697.

The spelling of 660510481 in words is "six hundred sixty million, five hundred ten thousand, four hundred eighty-one".